So, how do we figure out first how to draw the skeletal structure of this molecule here?

那么，我们如何来解决它,首先是如何画出这个分子的骨架结构？

麻省理工公开课 - 化学原理课程节选

So, our second step, as we go through our Lewis structure rules, is to figure out how many valence electrons we have in our entire molecule.

那么，我们的第二步，按照路易斯结构的规则，应该是判断在整个分子中,包含多少个价电子。

麻省理工公开课 - 化学原理课程节选

Now, we know that there's more structure to this molecule.

现在，我们知道关于这个分子更多关于结构的东西。

麻省理工公开课 - 固态化学导论课程节选

It's really remarkable how far--how fast we have come from just knowing the structure of this molecule to be able to manipulate it and study it in great detail.

我们在短时间内取得了非凡的成就,从最初仅仅知道DNA分子的结构,发展到能够深入研究并加以操控它

耶鲁公开课 - 生物医学工程探索课程节选

So this means we can actually calculate this for any molecule that we've drawn the Lewis structure for, because we actually do need to draw the Lewis structure before we know, for example, how many of each of these we have, or at least go through the rules.

这意味着我们可以将原来画过,路易斯结构的分子的形式电荷计算出来，因为我们其实在画出,路易斯结构之后才能知道，比如，这些量的值是多少，或者至少我们需要经过前面的那些步骤。

麻省理工公开课 - 化学原理课程节选

And resonance is the idea that sometimes one single Lewis structure does not adequately describe the electron configuration around a given molecule, so instead you need to draw two different Lewis structures to describe that more appropriately.

而所谓共振态,就是有时候一个路易斯结构不足以,完整描述一个给定分子的电子排布，因此这时你需要同时画出两个,不同的路易斯结构来描述它,这样会更恰当。

麻省理工公开课 - 化学原理课程节选

So remember, that when we talked about Lewis structure, the organizing principle behind Lewis structures is the idea that within the molecule the atoms are going to arrange their valence electrons, such that each atom within the molecule has a complete octet or full outer shell.

记得，当我们讨论路易斯结构的时候，路易斯结构所遵循的组织原则是这样一种思路,那就是分子中的原子都倾向于,重新安排它们的价电子,使得分子有一个完整的,“八隅体“或者排满的外壳层。

麻省理工公开课 - 化学原理课程节选

In class on Monday, we did go over the geometries, and the geometries themselves are very straightforward, once you know what the Lewis structure is, but remember, you can't just always look at a molecule and automatically know the Lewis structure.

在周一的课上，我们讲过了几何形状，一旦你们知道了Lewis结构，这些几何形状是十分直接的，但记住，你不能总是仅仅看一眼,分子就知道它的Lewis结构。

麻省理工公开课 - 化学原理课程节选

The whole structure of a DNA molecule looks like this, going back to a more cartoon version like I showed you before but adding some detail onto it now.

NA分子的全部结构都和,刚才的卡通模型上差不多,但细节更为丰富

耶鲁公开课 - 生物医学工程探索课程节选